---
title: "Userdata"
url: /docs/en-us/luau/userdata
last_updated: 2026-06-24T18:42:13Z
description: "Arbitrary C/C++ data that exists in Luau."
---

# Userdata

Userdata is one of the basic types in Luau. Userdata represents arbitrary C/C++ data that exists in Luau. See [Userdata](https://www.lua.org/pil/28.1.html) for more information.